Theron was born November 24, 1923, in Geneva, Kansas, the son Edward Anthony and Anna Thresa (Mabie) Fitzpatrick. He grew up and lived his entire life in the Geneva and Neosho Falls communities.

On August 22, 1948, Theron married Pauline Stovall. He enjoyed farming, raising cattle, and also ran a saw mill with a neighbor during the winter months. He liked to hunt and fish with family and friends. Pauline preceded him in death November 15, 2004.

Theron served on the board of directors of the Piqua Farmers Coop and Woodson County F.H.A.